Headlight.



P. s. BAILEY.

HEADLIGHT.

APPLICATION FILED JUNE 17, l9l5.

' Patented Aug. 29, 1916.

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PERCY S. BAILEY, 0F LYNN, MASSACHUSETTS, l COMPBJQ'Y, A CORPORATION ASSIGNOR TO GENERAL ELECTRIC OF NEW YORK.

HEADLIGHT.

Application filed .Tune 1?, 1915.

To all whom it may concern:

Be it known that I, Pnuor S. BAILEY, a citizen of the United States, residing at Lynn, county of Essex, State of Massachusetts, have invented certain new and useful Improvements in Headlights,oi which the following is a. specification.

My invention relates to a headlight, and more especially to a headlight provided with a reflector and with an incandescent lamp as the light source, and more particularly relates to a device for adjusting and securing the lamp in any desired position with reference to the reflector.

When it is desired to projecta horizontal from a. headlight in front of a.

beam of light vehicle, a parabolic reflector is commonly used, with the source of light placed as nearly as possible at the focus of the reflector. Any slight displacement of the light source from the focus, such as may result from faulty Construction of the lamp itself or from shocks which are transmitted to the headlight from the disturbs the beam of light. This is particularly true when an incandescent lamp is provided with a concentrated filament, such as is now in use.

My invention provides means for readily adjusting the lamp so as to bring the light source to any desired point, such as the focus of the icllcctor, and for securing the same in its adjusted position by a single clamping operation.

For a fuller understanding of my invcntion, reference may be had to the accompanyiug drawing, in which- Figure 1 is a vertical section through a headlight embodying my invention,- Fig. 2 is a rear end view of the supportfor the lamp and the clamping means therefor, and Fig. 3 is a modification of the clamping means.

In the drawing. if) is the casing, partially broken away. or a headlight. in connection with which I have illustrated my invention,

and 11 is a parabolic reflector for the head- 7 light, also partially broken away, and secured to the casing in any suitable manner (not shown). A clamping member 12 is composed of two sections preferably hinged at one end to a pin 13, which is secured to an inwardly projecting lug 141 of the casing 10. lhe clamping member is provided with a transverse opening the walls of which are vehicle, seriously.

Specification of Letters Patent.

Patented ring. 29, 1918. Serial No. 34,724.

spherical, as at 15, to form a ball socket. The free ends 16 of the clamping member 12 are somewhat extended, and are, in the form shown in Figs. 1 and 2, tapered and received in a correspondingly tapered opening 18 within a screw-threaded member 17 which is received in a screw-threaded opening within the casing. A split ball 19, which is provided with a transverse opening, is received Within the ball socket of theclamp 12. The two sections of'the split ball are preferabl connected by a U-shaped part which extend: into a. lateral recess 21 formed 12, Which part is elastic and biased to separate the two parts of the ball when the same are released. lamp support 22, for the incandescent lamp 23, is received within the opening in the split ball 19. This lamp support is here shown as a metal shell, Within which is an insulating member 24, Within which, in turn, is the lamp socket 255, in the usual manner. led to the lamp through a. bushing casing and through openings 28 in the rear end of the socket member 25. The portion of the casing immediately behind the lamp support is provided with an opening which is closed by a removable cap 29, through which opening access may be readily had to the light support, for the purpose of adjusting the same.

In operation, when it is desired to bring the filament of the lamp to the focus of the reflector, the screw-threaded member 17 is moved outwardly, and the clamping member 12 is thereby slightly opened. The operator may then freely turn the ball 19 within its socket by manipulating the rear end of the lamp support, and, at the same time, longitudinally move the lamp support through the ball. These two IUOVQII'ICDtS make the lamp universally adjustable with reference to the reflector of the headlight. When the lamp has been brought'to the desired position. the operator may, by screwing the member 17 inwardly with one hand, clamp the lamp support in the desired position, leaving the other hand free to liold the support in the desired position until the clamping operation has been completed.

Tn the modification shown in Fig. 3, the clamping operation is eil'ected by means of a winged screw 17 clearance opening in the free end of one clamping member, the screw-threaded end 27 in the in the clamp which passes through a engaging a screw-threaded opening in the free end of the other clamping member. It will be apparent that in either of the forms shown in Fig. 2 or Fig. 3, the operator effects the clamping operation with one hand, leaving the other hand free to hold the lamp.

socket in the desired position.

In accordance with the provisions of the patent statutes, I have described the principle of operation of my invention, together with the apparatus Which I now consider to represel'it the best embodiment thereof; but I desire to have it understood that the apparatus shown is only illustrative, and

that the invention can other means. 'WhatI claim as new by Letters Patent of the United States, is: 1. In a headlight, a split clamp hinged at one end formed with a ball socket, a split be carried out by ball received in said socket, a lamp support passing through and longitudinally movable I in said ball, and a member for engaging the free ends of said clamp to secure the lamp support in position.

2. In a headlight, a split clamp hinged at one end and formed with a ball socket, a split ball received in said socket, a lamp support passing through and longitudinally movable in said ball, and a screw-threaded member extending through the casing and formed with a recess for the reception of the free ends of the clamp, support may be clamped in position by the longitudinal movement of the member ex tending hrough the casing.

. vided with a and desire to secure.

whereby the lamp 3. In a headlight comprising a casing and a reflector, a split clamp hinged at one end and. formed with a ball socket and having its free ends tapered, a ball received in said socket, a lamp support passing through and longitudinally movable in said ball, and a screw-threaded member passing through the casing-and provided with a tapered recess forthe reception of the tapered ends of the clamp.

4. In a headlight comprising a casing and a reflector, a lamp.1ocated Within. the reflector, and means for adjustably securing the lamp Within the reflector comprising a split clamp pivoted to the casing and proball socket, a split ball received in said socket, a lamp standard passing through said ball, and a member longitudinally adjustable within the casing for engaging the free ends of the clamp and se' curing the lamp in any desired position with. reference to the reflector.

5. In a headlight, a clamp hinged at one end and formed with a ball socket and with a recess extending outwardly from the socket, a split ball received in said socket and formed with a U-shaped connecting portion, a hollow lamp support passing through and longitudinally movable in said ball and adapted to carry the conductors to the lamp, and a member for engagin the free ends of said clamp to secure the amp support-in position.

In Witness whereof, I have hereunto set my hand this twelfth day of Jana 1915.

PERCY S. BAILEY. 

